You can change your password on the login screen.
Enter the email address you signed up with and click 'Forgot password'. Sumdog will send you an email containing a link to reset your password.
If you get a message that the 'token' has expired, request a password reset again.
If you don't have access to your email address, unfortunately we won't be able to change your password since we can't confirm it's your account. In this case, either set up a new account or contact us to see if we can help.
If you can't remember the email address you signed up with, another teacher in your school can help you find it.